set hive.auto.convert.join = true;

explain 
SELECT  *  FROM src src1 JOIN src src2 WHERE src1.key < 10 and src2.key < 10 SORT BY src1.key, src1.value, src2.key, src2.value;

SELECT  *  FROM src src1 JOIN src src2 WHERE src1.key < 10 and src2.key < 10 SORT BY src1.key, src1.value, src2.key, src2.value;
